Abstract：Connections between precast concrete column and foundation can be achieved by inserting the extended longitudinal
reinforcement in precast concrete column into the corrugated pipe with high-strength filler. In this study, a low-frequency cyclic
loading test was conducted for eight precast concrete columns and one integral cast-in-place column for comparison. The main
investigated influencing factors include the axial compression ratio, the strength grade of column stirrup, and the bonding condition
of steel bar and concrete within the range of 5d (d is the diameter of steel bar)from the column base. Experimental results indicate
that the energy dissipation coefficients of the precast columns connected by the proposed method are similar to those of the integral
cast-in-place columns, but the ductility factors of these precast columns are greater than those of the integral cast-in-place columns.
After the bondless treatment within the range of 5d from the column base, the ductility factors of columns can be increased by 18%~25%
and the energy dissipation capacity can be increased by 13%~20%. By increasing the strength grade of stirrups, the ductility factors of
columns can be increased by 5%~10%, and the dissipation capacity can be improved by 8%~16% .
